Feed-mill



'2' SheetsSheet 1.

(No Model.) U

JV. HANSON.

' FEED MILL. I No. 552,247. Patented Dec. 31, 1895.

I l 1\ m No Moder. z sheets-sheez 2.

J. HANSON.

FEED MILL. No. 552,247. 9555115 51355. 31,1895.

UNITED STATE PATENT OFFICE.

JOSEPH HANSON, OF INN V'OOD, IOWVA.

FEED-MILL.

SPECIFICATION forming part of Letters Patent l\l '0. 552,247, dated December 31, 1895.

Application filed March 11, 1895. Serial No. 541,340. (No model.)

The object of the invention is to provide a simple, compact, and inexpensive grinding- -mill, which shall be durable in practice, not

liable to get out of order, and which may be adjusted to the varying conditions of the grain, and to regulate the feed of the grain to the grinding-cylinder.

To this end the invention consists in the features and details of construction and arrangement of parts hereinafter fully described, illustrated in the drawings, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of my improved feed-mill complete. Fig. 2 is a vertical longitudinal section through the same, showing the crushing-cylinder and concave, the feed-chute leading thereto, the hopper, the adjustable feedrolls, the hinged supporting-frame for upholding the concave, the elevating-carrier, &c. Fig. 3 is a rear elevation of the feedmill, showing the mechanism for adjusting the pivoted concave frame, the movable feedroll, &c. Fig. 4 is a detached perspective view of the concave, the pivoted frame supporting the same, and the jointed-link sup- Referring to the drawings, 1 1 indicate a series of longitudinal timbers constituting the base of the supporting-frame of the machine; 2 2, a corresponding series of inclined timbers secured at their lower ends to the longitudinal timbers 1, and upheld and braced by means of inclined timbers interposed between the base 1 and the other inclined timbers referred to. The longitudinal timbers 1 are connected by suitable transversely-arranged beams 4 at either end.

5 indicates the main driving-shaft of the machine, which is mounted in suitable bearings 6 secured to the inclined timbers 2 and provided with a main driving-band pulley 7. Intermediate its ends the shaft 5 is provided with the main crushing and grinding cylinder 8, which is keyed thereto and interposed between two of the bearings 6, said bearings and the supporting-timbers 2 being arranged very closely upon either side of said cylinder for giving the proper support thereto.

The cylinder 8 is made from natural stone, being formed upon its periphery or grindingface with corrugations 9, adapted to revolve in close proximity to a similar corrugated surface in the concave 10. The concave 10 is also formed from natural stone and is mounted in and supported by a triangularshaped frame 11, as shown in detached view, Fig. 4:, composed of two parallel horizontal arms 12, vertical posts 13, and inclined connecting-braces 14:. The horizontal arms 12 are connected by transversely-arranged timbers 15, and the vertical posts 13 are connected by a cross-bar 16, thus forming a strong and compact frame for supporting the concave. Curved end pieces or sides 17 are interposed between the grinding-face of the concave and the inclined braces '14:, serving to prevent the grain while it is being ground from escaping from the concave at such points.

The horizontal bars 12 of the concave frame are provided at one end with concavities 18, adapted to rest upon a stationary rod or shaft 19, located near the delivery end of the machine-frame. The other end of the concave supporting-frame is upheld by means of a jointed or linked supporting-rod 20, consisting of an upper threaded rod 21 and a lower cross-head 22, underlying the ends of the horizontal bars 12 of the concave frame and resting in concavities 23 in the lower faces thereof. The threaded rod 21 extends upward through the beam 24, the ends of which rest upon ledges or brackets 25, secured to the inclined braces 3 upon the rear faces thereof, as shown. Above the beam 21 the threaded rod 21 receives a thumb-nut 26, by turning which the rear en d of the concave sup porting-frame may be elevated or lowered for bringing the grinding-surface of the concave nearer to or allow ing it to recede farther from the revolving cylinder 8, above described. The upper threaded rod 21 and the lower cross-head 22 are pivoted together by means of a wooden pin 27, which is adapted to break and allow the concave to fall away from the cylinder when a hard substance gets wedged between the cylinder and concave or the grain becomes congested therein.

The concave supporting-frame is provided at its upper end with a tapering chute 28, secured thereto and projecting upward beneath the hopper and immediately underlyin the feed-rolls.

29 indicates the hopper, which may be of any desired form and size, and which is provided with a sliding gate 30 within the same, and a rod or handle 31, projecting through a perforation in the side wall of the hopper for opening and closing the same. The hopper 29 is provided with an inclined bottom 32, and with downwardly-projecting ears or lugs 33, provided with perforations 31 for the reception of a transverse shaft 35 j ournaled therein, and carrying a stationary feed-roll 36, located just outside the inclined bottom or discharge-outlet of the hopper 29. The shaft 35 extends laterally through a bearingbracket 37, secured to one of the inclined'timbers 2, and outside of said bracket it is provided with a pulley 38, from which a band 39 extends to and around a pulley 40 on the main driving-shaft 5, by means of which rotary motion is imparted to the feed-roll 36.

-11 indicates the adjustable feed-roll,which is mounted in a sliding frame 42, adjustable toward and away from the stationary roll 36 by means of a threaded crank-shaft 43,1nounted in a bracket 41, secured beneath the hopper. The threaded shank of said crank-shaft 43 engages a threaded lug or plate 45 on the bottom of the sliding frame 42. By turning the crank-shaft 43 the movable feed-roll may be adjusted toward and away from the stationary feed-roll for regulating the amount of grain which may be fed to and between the cylinder and concave. The adjustable feedroll outside of the sliding frame 42 is provided with a perforation 46 and is connected by means of arod or shaft 17, having hooked or looped ends 18, with a short shaft 19, mounted in the upper end of the bracket 37, said shaft 49 having keyed thereto a sprocket-wheel or spur-gear meshing with and driven by a similar spur-gear keyed upon and revolving with. the shaft 35, above described. By means of the universal link connect-ion between the adjustable fecd-roll and the short shaft 49 said adjustable feed-roll may be driven at all times under its various adjustments.

By the construction described the feed of i the grain to the crushing-eylinder and concave may be regulated by adjusting the movable feed-roll as indicated, and the feed may be entirely out oif by closing the sliding gate 30 when it is desired to stop the machine or in case the concave should be thrown down, as above described.

50 indicates the elevating carrier or conveyer, which consists of an endless slatted apron 51 traveling around two rollers or shafts 52 and 53, mounted in a suitable frame or box 5 1, as shown. The frame of the elevatingcarrier is mounted at its lower end upon and supported by the stationary rod or shaft 19 by means of suitable straps 55, secured to the elevator frame or box beneath the same and. passing around. or partially around said. rod or shaft 19. The lower end of the elevator or carrier projects beneath or underlies the delivery end of the concave and receives the meal therefrom. After reaching the upper end of the carrier or conveyer the meal is discharged through an inclined or downwardlyextending flaring mouth or extension 56. A gate or deflector is pivoted at its lower end within the flaring mouth or extension 56 referred to and is adapted to swing at its upper end across said mouth. The gate 57 is provided with a pin 58, extending through a curved slot 59 in the outer wall of the extension 56, whereby said gate or deflector 57 is adapted to be moved from one side to the other for directing the meal to one or the other of two bags or receptacles placed beneath the flaring mouth 56 in a manner that will be readily understood.

The conveyer or elevator apron is driven by means of a pulley 60 on an extension of one of the apron-shafts, a band 61, and a pulley 62 on the main driving-shaft 5. The upper end of the elevator-frame may be supported by means of braces 63 connected therewith and extending therefrom to and connected with the hopper.

In order to prevent the escape of the meal at the lower end of the elevator or conveyor, and in order to secure a close joint or relation between the elevator-casing and the revolvin g cru shin g-cylinder, a cover 64cis placed over the lower end of the elevator-easin g and held in place thereon by means of side flanges or wings 65, bearing at their lower edges upon the projecting ends of the lower elevatorapron shaft or other suitable stops. The cover 6% is thus adapted to be removed, when desired, for giving access to the lower end of the elevator-apron.

Various changes in the form, proportion, and the minor details of construction. maybe IIO ' resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, I

claim 1. The combination with the hopper of a feed mill, of a feed slide, a positively driven feed roll journaled in said slide, and means for adjusting said slide so as to move the feed roll across the discharge opening in the hopper, substantially as specified.

2. In a feed mill, the combination with the hopper, of a stationary feed roll located at the discharge opening of the hopper, and an adjustable and positively driven feed roll journaled in a feed slide on one wall of the hopper, substantially as and for the purpose described.

3. In a feed mill, a rotary crushing and grinding cylinder, an adjustable concave, and means for adjusting said concave, in combination with the stationary and movable feed rolls located at the discharge opening of the hopper, and a sliding section of the Wall of the hopper having the movable and positively driven feed roll journaled therein, substantially as described.

4. In a feed mill, the combination with the hopper thereof, of a stationary feed roll, an adjustable feed roll mounted in a sliding frame, adjustable toward and away from the fixed feed roll, a threaded crank shaft for ad- 3' usting said sliding frame, a short shaft geared to the fixed feed roll shaft, and an interposed shaft or link having a universal connection with said short shaft and the adjustable feed roll, all arranged and adapted to operate substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JOSEPH HANSON. Witnesses:

F. H. SKEWIs, CHAs. SKEwrs. 

